XGN66-12 Indoor Type Alternating-current Metal-enclosed Switchgear

XGN66-12 Indoor Type Alternating-current Metal-enclosed Switchgear

XGN66-12 indoor type alternating-current metal-enclosed switchgear (hereinafter referred to as switchgear) is a new generation of HV electrical appliance set.
Product description

Model meaning


Product overview

XGN66-12 indoor type alternating-current metal-enclosed switchgear (hereinafter referred to as switchgear) is a new generation of HV electrical appliance set. It complies with GB3906 Alternating-current metal-enclosed switchgear for rated voltage of 3~35kV, DL404 Indoor AC high voltage switchgear panel, and IEC60298 A.C. metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52kV. 

This switchgear adopts overseas advanced technologies, is designed and developed independently by our company, which solved the problems of high trouble rate and large size of similar products. It is featured with small size (only half volume of common cabinet), good breaker performance, high reliability, reliable and simple “five-prevention” interlocking mechanism, etc. 

It is applicable for three-phase single-bus segment systems of AC50Hz and 3.6-12KV, used for electric energy receiving and distribution, it controls, protects and monitors the circuits. It is widely used in power plants, substations, and industrial and mining enterprises, high-rise buildings, also can be used in switching stations with ring main unit. 


Ambient conditions

● Ambient temperature: -10℃~40℃; 

● Altitude: not exceed 1000m; 

● Daily mean of relative air humidity not exceed 95%, monthly mean not exceed 90%; daily mean of water vapor not exceed 2.2×10-3Mpa, monthly mean not exceed 1.8×10-3Mpa; 


Structure & features 

● Cabinet body is made of angle steel by welding. 

● Circuit breaker chamber is located in the middle (lower) part of cabinet, it is convenient to install, debug and maintain. It is equipped with ZN63A(VS1-12) circuit breaker as the standard, and has pressure release channel that ensures personal safety. 

● Adoption of advanced and reliable rotary isolating switch that make it possible to enter into breaker chamber for overhaul under live condition of main bus. 

● Ingress protection level of the whole cabinet is IP2X. 

● Reliable and compulsory mechanical interlocking device that has complete functions and meet the “five-prevention” requirements. 

● Reliable ground system. 

● Inspection window in the door is convenient to view the working state of components inside the cabinet. 

● It adopts the same locking mechanism JSXGN with that of XGN2-12 switchgear for operating mechanism, which is simple and reliable to use. 

● Incoming and outgoing cables are lower than the front part of cabinet bottom that is convenient for user to connect


Technical parameters

Main technical parameters of switchgear 

Item UnitData
 Rated voltage  12
 Rated insulation voltage 1min power frequency withstand voltage Phase-to-phase, to-ground isolating distance KV 42
 48
Lightning impulse withstand voltage (phase-to-phase, phase-to-ground / isolating distance)        75/85
Rated frequency Hz 50
Rated frequency
Rated current of branch bus
4s short-time withstand current
Rated peak withstand current
 A
 A
   uΩ 
  KA
 800
 630
  20 
 50
 1250
     1000、1250
   31.5 
80
 2000-3150
   20000-3150
  40 
   100
Main circuit current KA <300
Protection class  IP2×
Phase-to-phase central distance
Outline dim. (W, D, H)
 mm
 mm
 165±1
       900×1000×2300
 210±1
       900×1000×2300
 
       230±1
       1100×1000×2300

Note: it needs additional insulating separator if adopts the 840width.  
 
Main technical parameters of ZN73-12 vacuum circuit breaker 

 Item  Unit VN3-12 VS1-12
 Rated voltage KV            12
 1min power frequency withstand voltage KV            42
 Lightning impulse withstand voltage KV            75
 Rated frequency Az            50
 Rated current 
 Rated short-circuit breaking current
 Rated short-circuit making current (peak)
 4s rated short-time withstand current
 Rated peak withstand current

 A
 KA
 KA 
 KA 
 KA

 630、1250
 20、25、31.5
 50、63、80 
 20、25、31.5 
 50、63、80
 1600-3150
 31.5、40
 80、100 
 31.5、40 
 80、100
 Rated breaking current of back-to-back capacitor A

 400

 Rated breaking current of single capacitor bank A

 630

 Operating sequence 

 O-0.3S-CO-180s-CO

 Breaking current times  Times

 30

 Mechanical life 

 10000

 Rated tripping current  A

 5

 Rated operating voltage  Closing coil
  Opening coil
 V

 DC220、AC220

 Circuit resistance  uΩ

 ≤35

 ≤40


Technical parameters of isolating switch 

Item Unit GN19-12C/630
       GN30-12/630
       GN30-12D/630
 GN19-12C/1000
       GN30-12/1000
       GN30-12D/1000
 GN19-12C/1250
       GN30-12/1250
       GN30-12D/1250
 2000
       GN30-12/1250
       3150
 Rated voltage KV

 12

 1min power frequency withstand voltage KV

 42

 Lightning impulse withstand voltage (phase-to-phase, phase-to-ground / isolating distance)

 KV

 75/85

 Rated current  A 630 1000 1250 2000-3150
 4s short-time withstand current
 Rated peak withstand current
 KA
       KA
 20
       50

 31.5
 80

 40
       100

If you the xgn66-12 indoor type alternating-current metal-enclosed switchgear caters to your requirement, welcome to buy the high quality equipment made in China from us. As one of the leading manufacturers and suppliers of various industrial electrical products in China, we won't let your down.

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